Knob attachment



(no model.) 2 sheets-sheet `1.

J. A. GIBSE.

KNOB ATTACHMENT.

No. 542,048. Patented J-uly 2, 1895.

2 Sheets-Sheet 2.

"(NoModel.) J. A. GIESE.

KNOB ATTACHMENT. No. 542,048. APal/sented.July 2, 1895.

@XY may v .MZ/MM n JW/MSQZ'QS@ m i Y @his @W50/ww a UNITED STATES PATENT OFFICE.

JAMES A. GIESE, OF IRVING PARK, ILLINOIS.

KNOB ATTACHNI ENT.

SPECIFICATION forming part of Letters Patent No. 542,048, dated J'uly 2, 1895.

Application led March 2l, 18911. Serial No. 504,554. (No model.)

To all 'whom it may concern:

Be it known that I, JAMES A. GIESE, a citizen of the United* States, residing at Irving Park, in the county of Cook and State of Illinois, have invented certain n ew and useful Improvemen ts in Door-Latches, which are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part hereof, in which- Figurel shows a part of a door with a mortise-latch provided with my new and improved construction of the spindle, knob-shank, and connecting parts. Fig. 2 shows the interior construction of arim-latch with myimproved construction of knob-shank and spindle applied thereto. Fig. 3 shows a plan View of an escuteheon-plate. Fig. t shows a part of my knob-shankand spindle applied to a rimlatch,partlyin section. Fig. 5 shows my rimlatch and its knob-shank and door-knob connected by my free spindle, as seen in plan,the cutting-plane being passed through the center of the slot of the latch-back. Fig. 6 shows the same parts when cut by a vertical plane through the center of the knobspindle. Figs. 5 and 6 are herewith supplied to show the conitruction as applied to the opposite sides of a Like letters refer to like parts.

The object of my invention is to produce a spindle for door-knobs which shall require no adjustment to the thickness of the door in securing the knobs thereto, together with other improvements connected therewith, as hereinafter set forth. To attain said desirable ends I construct my said new spindle and its connected parts in substantially the following manner, namely:

I make the ordinary square spindle b Without holes, notches, orindentations of any kind. I also make the knob c hollow, especially when great latitude for thickness of doors is desired. I provide the knob-shank e with a shoulder, beyond which the shankis smaller, for obvious reasons. I also provide an escutcheon-plate d with a round hole to lit said reduced shank and notches or slots h, diametrically opposed to each other, adapted to pass the spursf made on the knob-shank be low said shoulder, just the thickness of said escutcheon-plate. Cylindrical anges g and g form integral and opposite members of said plate d, the former embracing the knob-shank while the latter enters a hole in the door to rigidly hold the plate against lateral thrust,

while screws or other well-known devices hold4 it to the door.

Every mortise-latch a has its socket-piece, technically termed a follower, through which the spindle passes and which holds itin a fixed position, from which it may turn within adefinite angle to each side of its normal position. When the plates d and knobs `c are put upon the door, the slots and spurs vmanently, as the spurs'cannot now turn to the slots, and the pull on the knob is on the plate d instead of on the spindle b.

For rim-latches my construction for the door side of the ttings `is as already described; but on the latch side the back of the latchcase serves as an escutcheon-plate by cutting a slot h longitudinally with the case through the back of the case. I apply the spurs fto the shank e', as to e, said spurs moving on the. .inner surface of said back, as on vthe escutcheon-plates. In this case the knob-shank c has a fiange c2. shouldered in a boss on the back of the latch. Said flange covers the slots h', and it also steadies and stiens the knob laterally. An intermediate thickness e2 of the shank gives additional bearing and steadiness to said parts. The follower-armst' are of the usual construction and operation; but they must be placed on the spurs f after they have been placed into their normal position, which is that shown in Diametrically opposite sets of spurs fand f and slots h and h are here shown because far preferable to a single slot and spur, which would be onesided and undesirable in operation; or,'on the other hand, to setsof three or more such. parts, because the latter could not be made to operate so readily by unskillful workmen, although the increased bearing-surface would ICO in itself be desirable. In this construction the knob-spindle b is free to slide longitudinally, and its only strain is torsional. The many screw-threaded holes and packing-rings and the screws to connect the knob and spindle and. the annoyances due to such construction are in my construction avoided. In rimlatches I also dispense with Vthe follower, because the part of the shank e', which carries the arms or spurs f', goes beyond the es'- cutcheon-plate, which in said latch is the back or cover. of the latch itself, and there, in addition to the duty of the spurs, as in a mortise-latch, the same spurs operate the followerarms.

What I claim is- 1. The combination with a longitudinally slotted latch back, of a knob-shank with spurs integral therewith and slide actuated by said spurs without intervening mechanism, substantially as specified.

2. The combination with a longitudinally slotted latch-back, of a longitudinally free spindle and a knob-shank with spurs integraltherewith and slide actuated without `intervening mechanism by said spurs, substantially as specified.

3. The combination with a longitudinally slotted latch-back and slotted escutcheonplate, and knob-Shanks with fixed spurs, of a latch actuated by said spurs without interveny 4. Thecombination with a bossed and longitudinally slotted latch -back and fianged knob-shank with fixed spurs, of a latch actuated by said spurs, without intervening mechanism substantially as specified.

5. The combination with a bossed and lon- ,qitudinally slotted latch-back and flanged knob-shank with fixed spurs, of a latch actuated by said spurs without intervening mechanism, a lslotted escutcheon-plate, a spurred knob-shank thereon and longitudinally free spindle, substantially as specified.

6. The combination with a flanged knobshank with end cylindrically reduced, shouldered and spurred and longitudinally free spindle, of a longitudinally slotted latch-back and latch operated by said spurs without intervening mechanism, substantially as specified.

7. The combination with a longitudinally slotted latch-back and escutcheon-plate with hollow cylinder projecting from its base, of spurred knob-Shanks and longitudinally free spindle, substantially as specified.

JAMES A. GIESE. Witnesses:

WM. ZIMMERMAN, p A. BURTON STRATTON. 

